Improvement in machine for grinding corrugated knives



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Letters Patent No. 96,756, dated November 9, 1869.

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mPRovnMENT IN MAcHINErFoR GRINDING CQRRUGATBD KNIVES.

The Schedule referred to in these Letters Patent and making pan cf thesame.

To all whom 'it may concern Be it known that I, J only B. WILSON, of NewYork A York, have invented a certain new and useful Ma\` chilleforCutting and Grinding Corrugated Knives; and I do hereby declare thatthe following is a full and exact description thereof, reference beinghad to the accompanying drawings, making-part of this application.

My inventionv relates toa machine or apparatus for grinding or cuttingcorrugated knives, such as used accordingto "Letters Patent granted tome on the 19th day of March, 1867, for cutting corrugated veneers,orsother irregularly-shaped cnt-ters, and has for its object anorganized mechanism, by means of which the straight and bevelledsurfaces or edges of any zigzag or corrugated knife or cutter` may beperfecily cut and sharpened; and to this end,

My invention consists in lthe employment of a suitablecutter or grinder,in combination with a compound carriage, and a snitableformer, by meansof which the cutter or grinder, as itrnns in contact with the stock tobe cnt or sharpened, is moved up and down over the face of the stock,and fed along in the direction of the length of the blade or stock, in'a zigzag path of motion, corresponding exactly to theV corrugated shapeto be imparted to the said stock or knife, as will be hereinafter morefully explained; and

My invention further consists in the employment, in combination with acarriage which moves along in the direction of the length of the knifeAor stock being .operated upon, and with a zigzag motion, of -acarriage, which moves in a plane parallel to a plane across the faceofthe knife, and provided with a suitable rotary cutter or grinder, foroperating on the opposite or' other face of the knife, all ashereinafter more fully described. Y

To .enable those skilled in the art to make and use my invention, I willproceed to describe the construction and operation of` my new machine,referring by letters to the accompanying drawings, in`

whichg Figure 1 isa front elevation; Figure 2, a top view; Figure 3, avertical cross-section, at :1: iig. 2; Figure 4, a similar 4section at yy, iig. 2; Figure 5, a rear elevation; Figure 6, an end view; Figure 7,top detail view of carriage and former;

Figure 8, skeleton detail view. In the several figures', the same partswill befound designated by the same letters of reference.

A represents the frame of the machine, which may be changed in anysuitable manner, forthe support of the shafts and working-parts.

B is the main driving-shafato which the motivepower is applied, andwhich is provided with a pulley,

O, and drum D, from which pass belts to the ditierent.

shafts to be driven, l

'From the pulley C passesy a belt, E, to a pulley, F, on shaft G, which,like the main shaft B, and another shaft, H,'is mounted inrsuitablebearings or boxes on the main frame A.

' rlhe shaft G' carries the eccentrics I I', which op- ,erate avibratory carriage, and also an eccentric drinn,

J, from which passbelts to drive pulleys on said care riage, as will-bepresently described, and is provided with a spur-gear, K, whichmeshesinto a gear, L, on the shaft H, and drives the latter.

The shaft H carries a drum, M from which runs tb'e belt N, that drivesthe shaft O, as and for purposes to be explained. A

I is avibratory carriage, which is hung on pivots at a a, in verticalstandards Q Q, and which is vibrated, or moved-up and down by means ofpitmen 1t It, lpivotcd to it at b b, and extending upl to the eccentricsI I.

This carriage P is provided on its upper and lower faces with formers cc, and has a lscrew-shaft, S, running through it, which is provided atone end with t-wo fast pulleys, d (l, and a loose pulley, e, which aredriven by the` belts fj', from drum J, and effect the rotationalternatelyin opposite directions of the screw-shaft S, and this shaftpassing through a lug, T, projecting from the back of a carriage, U,feeds the latter alon'g, or causes it to slowly traversc'back and fort-hon the carriage P.

This carriage U has combined or arranged with it `another carriage, V,which, while it is obliged to travel along with carriage U, is free toplay iu and out at right angles to the line of traveliof both, and

is moved in and out by means of theformers c c, in one direction, andsprings g, in the other direction.

h h are bearing-points or projections, projecting from the carriage Vinto the corrugations of the formers c c. v

The carriage V is provided on top with two standards, IV W, in which, inlsuitable bearings, is hung a horizontal shaft, O, provided at cach endwith a crankplate, t', and near 'it-s middle, with a pulley, J, which isdriven by a belt, N,- from drum M.

From each ofthe crank-plates i extends downwardl a pitman, lf, and thesepitrnenk It impart a reciprocatory motion to the carriages y y, whichare arranged to slide in ways in the stands ll, and these carriages y yare provided with a horizontal shaft, fm, on which is hung a grinder orcutter, n, and which is driven, through. the medium of a pulley, o2, bya belt, p, passing from said pulley up tothe main drum D.

In the stands l l is hung? another horizontal shaft, q, which carriesanother cutter, w, and which is also driven, from the drum D, by meansof its pulley s and the belt p.

. These shafts and vtheir grinders-being used always separately, or atdifferent times, one to operate on one side of the knife, and the otheron the other, the belt p is lifted from the pulley of one to that of theother, as occasion requires.

tis the knife to be cut or sharpened, and which is. supposed to besecured in the tool-stock or car# riage of aveneer-cutting machine, inthe usual maunen-and so that it can be moved or adjusted, and

set at any given relative distance from either of the cutters, and atthe proper angles to be operated upon.

and so constructed and arranged, that by lmeans of' its handle a, and aspring latch-bar, b, the operator can ship, and cause tobe held, thebelts ff, in such manner as to run either of the pulleys d d, and one ofthese belts being crossed, and .the other straight,- the result of usingthem alternately on the fast pulleys d d is, that the screw-shaft S isrotated, in first one and then the other direction, to effect thetraverse back and forth of carriage U.

I will now explain briefly the general operation of the machine, inconnection with the description already given of its several parts. l

As I have before remarked, only one of the grinders is used at the sametime.

I will suppose the knife tand the parts c of the machine to be adjustedfor cuttingl the bevel-edge of the knife, as illustrated at iig. 3. Thecutter n, being now not required, either the belt N is unshipped, or,better, the carriages y, with their shaft and pitmen, all removed.

lThe machine being set in motion from its main driving-shaft, and thebelt p placed on pulley s, motion is imparted to the shaft G, and fromit, by means of the eccentrics I I, and their pitmen It R, the vibratorycarriage P is moved up and down, carrying l with it all its attachments,and the cutter-shaft q,

which, meanwhile, vis rapidly rotated bymeans of the belt 1J, runningfrom drum D.

Either the belt p s hould be elastic, or the drinn D shouldr be hung inrocking bearings, so as to move up and down like carriage P, to keepsaid belt always at the same tension. I have used the latter plan iu myworking-machine. l

At the saine time that the rapidly-revolving cutter is carried up anddown, the carriages U and V are carried along during the length of theknife t, by means of the screw S, and the carriage V isforced to play inand ont, toward and from the knife, by means ofthe corrugated formers cc, thus cutting the knife in a zigzag orcorrngated form, in longitudinalsection.

When the cutter has been carried the whole length of the knife in onedirection, the operator ships the belts f j; and causes the carriages UV-to travel in the opposite direction.

This compound motion of the rotating cutter, back and forth, during thelength of the knife, up and down' across its face,- and in and out toform the corrugations, is continued, the knife being adjusted up to thecutter all the time, until this vbevel-edge is cut er finished.-

lhe shaft q, with its cutter w, is now removed; the shaft m, with itscarriages y y, and pitmen 7c k, all put in working position; 'the belt ppnt on, and belt N shifted on to pulley J.

Z is a shipper, whichis pivoted at its lower end,

The carriage P P is then disconnected from its vi brating ordriving-pitmen It Rand being set at the proper elevation, is securelylocked in place. It may be' either supported by a rest from below, or itmay be locked to the frame by a lpin passed through one or both itsends, into the main frame, as seen at c, for instance, fig. 4.

The machine is now ready to cut the straight or opposite side of theknife t, andthe latter being adjusted, as seen at iig. 4, the'poweris'applied when motion is imparted through belt E to shaft G, thence, bygears K L, to shaft H, from the drum Mof which, passes the belt N, todrive-shaft O.

The pitmen on this shaft drive the carriages y y up and down in theirways, and thus cause the cutter n to travel up andvdown in an obliquedirection over the face of the knifet.

The ways are made at precisely the same angle or Obliquity as the planein which the face of the knife is arranged.

across the obliquely-arranged face of the knife, the compound carriage UV is moved, as described before, by means of the screw-shaft and thecorrugated formers, so as to feed the cutter along d'uring the length ofthe knife, and in and out, to form the corrugations.

It will be seen, that by means of au'orgauized machine, constructed .andoperating as I have explained, a corrugated knife-may have both itsfaces any irregular corrugations may be produced.

It will be understood, that inasmuch as the knife does not have to bereversed, it is immaterial whether the corrugatious of the formers c cbe regular or irregular, the opposite faces of the knife mustnecessarily be exactly alike,and producea eutting-edge which will run ina plane. Since it is not material what shape or direction thecorrugations of the formers assumes, it becomes easier and .lessexpensive to produce theseformers than if they 'had necessarily to bepelfeetly regular in their curves and depressions, as

position of the knife. In fact, I have found it practically impossibleto make the former near enough to perfection to enable me to reverse theknife and cnt both sides with .the sameeutter, without making animperfect edge. l

It will be understood that my machine may be adapted to producing allsorts of corrugatedorirregularly-shaped tools or implements, andthatymany of the details `of construction may be varied withoutdeparting from the mode of operation, which I be lieve to be entirelyoriginal, by which I am enabled to cut the opposite faces from the sameformers, without reversing the position of the knife.

I do not, therefore, wish tobe limited, in my claim of invention, to anyparticulaiity of detail, construction, and arrangement ofthe parts ofthe mechanism, so long as the vmachine involves the mode of operationdescribed; but having fully explained my new machine or apparatus forcutting and grinding corrugated or irregularly-shaped tools or knives,

What I elaiin as neugand desire to secure by Letters Patent, is- Y Amachine, in which the opposite faces of the knife may he cut inprecisely the same irregular form, and at an angle to each other incross-section, without reversing the position of the knife, by meanssubstantially such as and in the manner hereinbefore set forth.

In testimony whereof, I have hereunto set my hand and seal, this 2d dayof March, 1869.

- JOHN B. WILSON. [1.. s.)

Witnesses:

FREDERIC A. SAYER, Cuirs. A. Scorr.

While the cutter n n is thus moved up and down eut and 'shaped inprecisely the same curves, and that would be necessary were it attemptedto reverse the

